JP3479360B2 - Stencil printing machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate discharge storage box which is removable from the main body for storing used stencil printing base paper.
Conveying printing paper one by one to the plate cylinder When the printing paper is conveyed to the plate cylinder by the paper feeding means which is arranged above the paper feed table that can be moved in the vertical direction of the main body and is provided at the bottom of the plate discharge storage box. A configuration in which the paper feed tray moves up and down at a position where a part of the adjusting member that regulates the width of the printing paper is placed on the area in the take-out direction of the plate discharge storage box as the printing paper is reduced, or up to the vicinity of that position. The present invention relates to a stencil printing machine.

[0002]

2. Description of the Related Art FIG. 14 is a diagram showing a schematic structure of a conventional stencil printing machine, which is the stencil printing machine disclosed in Japanese Patent Laid-Open No. 6-199028. This stencil printer
A document reading unit 201 that optically reads an image of a document conveyed in the sub-scanning direction, and image information read by the document reading unit 201 is heat-sensitive perforated plate-made on a heat-sensitive stencil printing plate, and after plate making by a cutter 202. A stencil making unit 203 for cutting the stencil printing base paper S, a stencil discharging unit 206 for stripping the used stencil printing stencil paper from the plate cylinder 204 and discarding it in a stencil storage box 205, and stacking on a vertically movable sheet feeding stand 207. Pick-up roller 2
The paper feed unit 209 arranged below the plate discharge unit 206 that is taken out and sent out by 08, and the stencil printing base paper S after plate making are wound around the outer circumference of the ink-permeable plate cylinder 204 having a porous structure,
The printing unit 211 that presses the printing paper P supplied between the plate cylinder 204 and the press roller 210 with the press roller 210 to perform stencil printing with the printing ink, and the printed printing paper P that has been stencil printed is discharged. It is configured to have a paper discharge unit 213 stacked on the table 212.

In this stencil printer, the document reading section 2
When the image of the original is read by 01, the image information is heat-sensitive perforated on the heat-sensitive stencil printing base paper S, and the cutter 202 cuts the stencil printing base paper S.
The cut stencil printing base paper S is wound around the outer peripheral surface of the plate cylinder 204. Then, in synchronization with the rotation of the plate cylinder 204, the printing paper P is supplied from the paper feed unit 209 between the plate cylinder 204 and the press roller 210, and the printing paper P is pressed against the plate cylinder 204 by the press roller 210. The stencil printing is performed by using the printing ink. When printing with the stencil printing base paper S based on a new original, the previously used stencil printing base paper S wound around the outer peripheral surface of the plate cylinder 204 is peeled off and discarded in the plate discharge storage box 205. It

[0004]

In the stencil printing machine described above, the paper feed tray 207 which is vertically movable with respect to the main body is arranged below the plate discharge storage box 205.
Were placed apart from each other so that they would not interfere with the removal of the discharged stencil storage box 205 while being raised to the upper limit position.

Therefore, in order to secure a sufficient storage space for the plate discharge storage box 205 and the number of printing papers P that can be placed on the paper feed table 207, the space is increased in the height direction of the main body to enlarge the apparatus. There was a problem. In addition, when the storage space of the discharged stencil storage box 205 is prioritized, the paper feed tray 2
Since the number of printing papers P that can be placed on 07 is reduced, there is a problem that the printing papers P run out quickly and the printing papers P must be replenished immediately. On the other hand, when the number of printing sheets P placed on the paper feed tray 207 is prioritized, the storage space of the plate discharge storage box 205 becomes small, so that the inside of the plate discharge storage box 205 is immediately used. The printing base paper S becomes full, which causes a problem that the stencil sheet storage box 205 must be frequently taken out from the main body to dispose of the stencil printing base paper S inside.

By the way, although not shown in FIG. 14,
In this type of stencil printing machine, various sizes of printing paper are used to be placed on the paper feed table. Therefore, the width of the paper feed table is usually restricted according to the size of the printing paper. An adjustable paper feed fence is provided.

In the stencil printing machine equipped with the paper feed fence, a pickup roller for transporting the printing paper to the plate cylinder is arranged in the vicinity of the lower part of the plate discharge storage box,
When the paper feed tray is configured to be raised as the number of print paper sheets decreases, if the number of print paper sheets on the paper feed tray decreases, a part of the paper feed fence may hang over the area in the take-out direction of the plate discharge storage box, or It will move to the vicinity. In this state, if the used stencil printing base paper is transported to the stencil storage box, it may cause a transfer failure or the used stencil printing base paper may become full, and the paper feed fence will be obstructed. In some cases, it may not be possible to remove the stencil storage box from the main body, or it may be difficult to remove it.

In order to solve this problem, if the paper feed roller or the paper feed tray is arranged away from the plate discharge storage box so that the paper feed fence does not overlap the area in the take-out direction of the plate discharge storage box, the storage space of the plate discharge storage box is improved. In order to secure a large number of sheets of printing paper to be placed on the paper feed table and to secure a sufficient number of printing paper sheets, there is a problem that a space is taken in the height direction of the main body to increase the size of the entire apparatus.

The present invention has been made in order to solve the above-mentioned problems, and even if the stencil printing base paper causes a conveyance failure or the stencil storage box is full, it is detected,
The paper feed tray can be controlled so that it does not get in the way of pulling out the plate discharge storage box from the main body, and the storage space of the plate discharge storage box and the number of printing papers that can be placed on the paper feed tray are sufficiently secured to reduce the size of the device. An object of the present invention is to provide a stencil printing apparatus that can be achieved.

[0010]

In order to achieve the above object, a stencil printing machine according to a first aspect of the present invention has a removable stencil storage box in its main body and is wound around the outer peripheral surface of a plate cylinder. It has a plate discharging means for peeling off the used stencil printing base paper, transporting it to the plate discharging storage box and discarding it, and a paper feed table on which printing paper is placed, and a part of the paper feeding table is the plate discharge storing box. Paper feeding means arranged below the plate discharging means for feeding the printing paper one by one to the plate cylinder side by moving the paper feeding table to a range hanging in the area in the drawing direction of the box or in the vicinity of the range. And, the stencil printing base paper stripped from the plate cylinder is conveyed to the stencil storage box, and a stencil sheet conveyance defect detecting means for detecting a conveyance failure during the conveyance, and the stencil sheet is discarded in the stencil sheet storage box. Full stencil sheet to detect when the stencil sheet is full Means out, is characterized by a control means for lowering the sheet conveying said feed table from a bad signal or the base paper full detecting means receives the sheet full signal from the base paper conveyance failure detection means.

A stencil printing machine according to a second aspect of the invention has a removable stencil storage box in the main body, and the used stencil printing base paper wound around the outer peripheral surface of the plate cylinder is peeled off to the stencil storage box. A plate discharging unit that conveys and discards the sheet, and a sheet feeding table on which printing paper is placed, and a range in which a part of the sheet feeding table hangs in a region in the drawing direction of the plate discharging storage box, or in the vicinity of the range. The paper feed means arranged to move the paper feed table to feed the printing sheets one by one to the plate cylinder side and the paper feed means arranged under the plate discharge means and the stencil printing base paper discarded in the plate discharge storage box are full. It is characterized in that it has a base paper full detection means for detecting that the base paper is full, and a control means for lowering the paper feed tray in response to a base paper full signal from the base paper full detection means.

The stencil printing machine according to a third aspect of the present invention has a removable stencil storage box in the main body, and the used stencil printing base paper wound around the outer peripheral surface of the plate cylinder is peeled off to the stencil storage box. A plate discharging unit that conveys and discards the sheet, and a sheet feeding table on which printing paper is placed, and a range in which a part of the sheet feeding table hangs in a region in the drawing direction of the plate discharging storage box, or in the vicinity of the range. The stencil printing base paper peeled off from the plate cylinder is a paper supply unit arranged below the plate discharge unit for moving the paper feed table to supply the printing sheets one by one to the plate cylinder side. A base paper conveyance defect detection unit that detects a conveyance defect during conveyance to the plate discharge storage box, and a control unit that receives the base paper conveyance defect signal from the base paper conveyance defect detection unit and lowers the paper feed tray. It is characterized by having and.

In the stencil printing machine according to claim 1 or 2,
The base paper full detection means includes a compression plate for compressing the stencil printing base paper stored in the plate discharge storage box, and a sensor for detecting that the compression plate has moved to a predetermined position during the compression operation. When the compression plate does not reach the predetermined position during the compression operation of, the base paper full signal is output.

In the stencil printing machine according to claim 1 or 2,
The base paper full detection means is a counter that counts the number of stencil printing base papers that are stripped from the plate cylinder and discarded in the plate discharge storage box, and the number of stencil printing base papers that can be stored in the plate discharge storage box in advance is discharged. When the count value of the counter reaches the discharge plate full data stored in the storage unit, the base paper full signal is output.

In the stencil printing machine according to claim 1 or 3,
The stencil sheet conveyance failure detection means has a sensor provided in the middle of conveyance in which the stencil printing stencil stripped from the plate cylinder is conveyed to the stencil storage box, and at the time of stencil ejection processing, the stencil printing stencil sheet is When the passage of the sensor is not detected within the processing time, the raw paper conveyance failure signal is output.

In the stencil printing machine according to the first, second or third aspect of the invention, the paper feed tray is lowered by the control means for a predetermined time.

In the stencil printing machine according to any one of claims 1, 2 and 3, a lower limit sensor which is arranged at a lower limit position apart from the plate discharge unit by a predetermined amount and detects whether the paper feed tray is at the lower limit position or not. The paper feed tray is controlled to be lowered by the control means until the lower limit sensor outputs a signal indicating that the paper feed tray is at the lower limit position.

[0018]

According to the above-described structure, when printing with the stencil printing base paper based on a new original, the used stencil printing base paper wound around the outer peripheral surface of the plate cylinder is peeled off and placed in the stencil storage box. A plate discharge process of transporting and discarding is performed. At the time of this plate discharge processing, the base paper conveyance defect detection means detects whether or not a conveyance defect has occurred during the conveyance of the stencil printing base paper stripped from the plate cylinder to the plate discharge storage box. The base paper full detection means detects whether or not the stencil printing base paper discarded in the plate discharge storage box is full. When the control means receives the raw paper conveyance defective signal from the raw paper conveyance defective detection means indicating the conveyance failure or the raw paper full signal indicating the full state from the raw paper full detection means, the paper feed tray on which the printing paper is placed is received. To lower. The lowering of the paper feed tray is performed for a predetermined time or until the paper feed tray reaches the lower limit position. In this state, the stencil storage box is pulled out from the main body to remove the stencil printing base paper which is not conveyed properly, or the used stencil printing base paper in the stencil storage box is discarded. In the stencil printing apparatus according to the fourth aspect, the used stencil printing base paper is compressed and stored in the stencil storage box by moving the compression plate to a predetermined position. If the compression plate does not reach the predetermined position during the compression operation of the compression plate, the sensor outputs a base paper full signal indicating that the plate discharge storage box is full. In the stencil printing apparatus according to the fifth aspect, the number of stencil printing base sheets that have been stripped from the plate cylinder and discarded in the plate discharge storage box is counted by a counter. This count value is compared with the plate discharge full data stored in the storage means in advance as the number of stencil printing base sheets that can be stored in the plate discharge storage box, and when the count value reaches the plate discharge full data, the plate discharge storage box is full. A base paper full signal indicating the state is output. In the stencil printing apparatus according to claim 6, when the stencil printing base paper stripped from the plate cylinder is transported to the stencil storage box during the stencil discharging process, a sensor provided during the transport is used for stencil printing within the processing time. If it does not detect that the base paper has passed, it outputs a base paper conveyance failure signal indicating a conveyance failure.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the stencil printing machine according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall configuration diagram showing an embodiment of a stencil printing apparatus according to the present invention, FIG. 2 is a side view showing a detailed configuration of a plate discharge section and a sheet feeding section in the apparatus, and FIG. 3 is a plate discharge storage box of the apparatus. FIG. 4 is a side view of the apparatus when the paper feed tray is raised to the upper limit position, and FIG. 5 is a view of the same when the paper feed tray is lowered to the lower limit position and the plate discharge storage box is removed from the main body. It is a side view which shows the state taken out. The stencil printing apparatus 1 includes a document image reading unit 2,
It has a heat-sensitive plate making unit 3, a stencil printing mechanism unit 4, a plate discharge unit 5, a paper feed unit 6, and a paper discharge unit 7.

As shown in FIG. 1, the document image reading section 2 is
It is arranged on the upper right side of the main body 8 and includes a document setting table 11, a document feeding roller pair 12, an image sensor 13, a document discharging roller pair 14, and a document discharging tray 15. A document to be printed is placed on the document setting table 11. The document conveying roller pair 12 takes in and conveys the document set on the document setting table 11. The image sensor 13 is, for example, C
The image of the original, which is composed of a CD and is reflected by the light source 13c and reflected by the original, is optically read from the stage glass 13a through the reflection mirror 13b and the lens 13d and converted into an electric signal. The document discharge roller pair 14 discharges and conveys the document read by the image sensor 13. The document discharge tray 15 is loaded with the documents discharged from the document discharge roller pair 14.

The reading of the original by the original image reading section 2 is started by pressing the plate making start button provided on the operation panel 103, which will be described later, after the original is set on the original setting table 11.

The plate making section 3 is arranged below the original image reading section 2 and has a thermal head 17 and a platen roller 18. The thermal head 17 includes a plurality of heating elements arranged in pairs vertically in a direction perpendicular to the plane of the drawing. The platen roller 18 is the thermal head 17
Is provided opposite to. In FIG. 1, a base paper roll holding unit 19 is provided on the right side of the plate making unit 3. The base paper roll holding unit 19 replaceably holds a roll body R around which a heat-sensitive stencil printing base paper S in the form of a continuous sheet is wound. A base paper cutter 20, a base paper guide plate 21, and a base paper transport roller pair 22 are arranged substantially linearly between the thermal head 17 and the platen roller 18 and a plate cylinder 25 described later. The base paper cutter 20 is composed of a fixed blade and a movable blade which are paired up and down, and cuts the stencil printing base paper S that has been plate-made for each plate. The stencil guide plate 21 is composed of a stencil guide lower plate 21a and a stencil guide upper plate 21b, and guides the plate-making stencil printing base paper S and conveys it to the document conveyance roller pair 22 side. The document conveying roller pair 22 is composed of a pair of upper and lower rollers, and conveys the stencil printing base paper S that has been plate-made to the clamp portion 33 of the plate cylinder 25 which will be described later.

In the plate making section 3, the stencil printing base paper S fed from the roll body R is conveyed by the platen roller 18 and subjected to heat-sensitive perforation plate making by the thermal head 17, and then one plate of stencil plate is made. The base paper for printing S is the base paper cutter 2.
The sheet is cut at 0, and is conveyed to the stencil printing mechanism section 4 side by a pair of document conveying rollers 22 via a base paper guide plate 21.

As shown in FIG. 1, the stencil printing mechanism section 4 includes
It has a cylindrical plate cylinder 25 which is arranged substantially in the center of the body 8 and is rotatable about its own central axis. The plate cylinder 25 is rotationally driven counterclockwise in FIG. 1 by a main motor 26 provided in the main body 8. A portion of the peripheral wall of the plate cylinder 25, which corresponds to the printing region, has an ink permeable structure.

A stage portion 27 is provided on the outer surface of the peripheral wall portion of the plate cylinder 25 along the generatrix direction on the outer surface thereof. The stage unit 27 is provided with a base paper clamp plate 28 that cooperates with the stage unit 27 to clamp one end of the stencil printing base paper S. A gear 30 is attached to a pivot 29 of the base paper clamp plate 28. The clamp solenoid 31 shown in FIG. 1 is attached to the frame side of the main body 8 which is a fixing member not shown in the figure. The clamp solenoid 31 vertically moves a clamp drive unit 32 having a drive gear 32a and a clamp motor (not shown) which is a drive source of the drive gear 32a, and the drive gear 32a is attached to the pivot shaft 29 by a gear 30.
Selectively engage.

In the clamp portion 33 having the above-described structure, when the drive gear 32a is rotationally driven while the base paper clamp plate 28 meshes with the gear 30, it is approximately 180 ° on the stage portion 27 of the plate cylinder 25. Rotate. That is, the plate making unit 3
The clamp position (the position shown in FIG. 1) that locks the front end of the stencil printing base paper S that has been conveyed from the plate in cooperation with the stage unit 27, and approximately 180 from this clamp position.
The base paper clamp plate 28 is rotationally driven about the pivot 29 between the rotated non-clamp position.

An ink supply pipe 35 is provided at the center of the plate cylinder 25. An ink supply hole 35a is formed so as to penetrate in the axial direction of the ink supply pipe 35, and a printing ink having an appropriate viscosity is dropped from the ink supply hole 35a. Below the ink supply pipe 35, the plate cylinder 25
Inside the squeegee roller 36 and doctor rod 3
7 is provided, and the ink dropped from the ink supply pipe 35 is supplied to the inner peripheral surface of the plate cylinder 25. Below the plate cylinder 25, a press roller 39 is provided which is in pressure contact with the squeegee roller 36. The press roller 39 is rotatable about an axis on one end side, and presses the printing paper P supplied between the press roller 39 and the plate cylinder 25 in synchronization with the rotation of the plate cylinder 25 against the outer peripheral surface of the plate cylinder 25. There is. As a result, the ink supplied through the ink passage area of the plate cylinder 25 and the perforation portion of the stencil printing base paper S is transferred to the printing paper P.

As shown in FIG. 1, the plate discharge portion 5 is disposed on the upper left side of the main body 8 and has a plate discharge claw 40. Plate ejection claw 4
0 is pivotally supported by a shaft 41, and as shown in FIG. 2, a plate discharge claw solenoid 42 is interlockingly connected to the base end thereof. The plate ejection claw 40 is rotationally driven about a shaft 41 within a predetermined angle range. That is, the tip of the plate discharge claw 40 moves between the peeling position of the stencil printing base paper S approaching the outer peripheral surface of the plate cylinder 25 and the standby position separated from the plate cylinder 25 by a predetermined distance. Driven to.

The stencil printing base paper S stripped off from the plate cylinder 25 is guided in a direction away from the plate cylinder 25 at the stripping position. To the left of the plate ejection claw 40, a plate ejection roller pair 45 including a plurality of sets of upper rollers 43 and lower rollers 44 arranged at equal intervals in the axial direction is provided. A guide roller 46 is provided in the axial direction on the plate cylinder 25 side adjacent to the plate discharge roller pair 45 so as to face the upper roller 43 of the plate discharge roller pair 45. A conveyance guide belt 47 is stretched between the upper roller 43 of the plate discharge roller pair 45 and the guide roller 46. On the conveying direction side adjacent to the plate discharge roller pair 45,
A guide roller pair 50 including an upper roller 48 and a lower roller 49 is provided in the axial direction so as to face the upper roller 43 and the lower roller 44 of the plate discharge roller pair 45, respectively. Between the upper roller 43 of the plate discharge roller pair 45 and the upper roller 48 of the guide roller pair 50, and between the lower roller 44 of the plate discharge roller pair 45 and the lower roller 49 of the guide roller pair 50, there are conveyance guide belts 51 and 52, respectively. Is stretched. The upper roller 43 of the plate ejection roller pair 45 is connected to a plate ejection motor 54 via a belt 53. The upper roller 43 and the lower roller 44 of the plate discharge roller pair 45 are interlockingly connected via a gear (not shown).

The lower roller 44 of the plate discharge roller pair 45 described above.
The lower roller 49 of the guide roller pair 50 is disposed on the main body 8 side. Further, the upper roller 4 of the plate discharge roller pair 45
3, the guide roller 46, the upper roller 48 of the guide roller pair 50, and the plate discharge motor 54 are arranged in a plate discharge unit 55 that is rotatable upward with respect to the main body 8. Then, when the upper roller 43 of the plate discharge roller pair 45 is rotationally driven in the clockwise direction in the drawing by the plate discharge motor 54, this rotation is transmitted to the lower roller 44 via a gear. Along with this, the transport guide belts 47, 51, 52 are rotationally driven in the clockwise direction in the figure, and the stripped stencil sheet S is transported in the transport direction.

A plate discharge sensor 60 is provided on the left side of the plate discharge roller pair 45. The plate discharge sensor 60 is the plate cylinder 2.
It detects the passage of the used stencil printing base paper S stripped from 5, and is constituted by a switch that is turned on / off by the rotation of the operating piece 60a, for example. The operating piece 60a is located between the transport guide belts 51 and 52 in a normal state. In this plate discharge sensor 60, every time the used stencil printing base paper S passes between the conveyance guide belts 51 and 52, the operating piece 60a is pushed up to change from ON to OFF and outputs a base paper passage signal. Further, during the plate discharge process, the plate discharge sensor 60 outputs a signal indicating that the used stencil sheet S has been turned off without being detected within a predetermined time, or when the stencil sheet S has not changed from being turned on to being turned off. It is outputting.

As shown in FIGS. 1 and 2, a plate discharge storage box 61 having a substantially fan-shaped cross section is provided on the upper left side of the main body 8 on the conveyance direction side of the guide roller pair 50. Waste plate storage box 61
The entire upper surface 61a is opened, a front surface 61b orthogonal to the upper surface 61a is exposed and is exposed to the outside, and a bottom surface 61c is formed in an arc shape. The plate discharge storage box 61 discards and stores the used stencil printing base paper S that has been conveyed by the conveyance guide belts 51 and 52. A handle 62 is provided on the front surface 61b of the plate discharge storage box 61. As shown in FIGS. 1 and 2, the plate discharge storage box 61 includes a handle 62.
The main body 8 can be pulled out by grasping the.

A plate discharge storage box 61 in the plate discharge unit 55.
The compression plate 6 having a hook-shaped claw portion 63a at its tip is provided on the upper part of the
3 is rotatably supported. The compression plate 63 has a rotating shaft 64 on the front surface 61b side of the plate discharge storage box 61, and is linked from the rotating shaft 64 via a belt 65 to a compression motor 66 fixed to the plate discharging unit 55. Compression plate 63
The standby position is a state in which the leading end is located above the plate discharge storage box 61. When the rotation from the compression motor 66 is transmitted to the compression plate 63, from the state of the standby position shown by the solid line in FIG. 1, as shown by the chain double-dashed line in FIG. 63a rotates in the clockwise direction in the figure along the inner wall surface of the arcuate bottom surface 61c, and pushes the used stencil printing base paper S to the inner wall surface side of the front surface 61b for compression.

A sensor blocking plate 67 is provided so as to project from one side of the compression plate 63 on the rotary shaft 64 side. The plate discharge unit 55 is provided with a standby position sensor 70 corresponding to the position of the sensor blocking plate 67 when the compression plate 63 is at the standby position. The standby position sensor 70 includes, for example, a light projector and a light receiver, the compression plate 63 is in the standby position, and the sensor blocking plate 67 is turned on to output a standby position signal when the light is blocked. A plate discharge full sensor 71 is provided on the rotation locus of the sensor blocking plate 67 in the plate discharge unit 55. The plate discharge full sensor 71 is composed of, for example, a light projector and a light receiver, and is turned on when the compression plate 63 rotates and the sensor blocking plate 67 blocks light. The compression plate 63 rotates from the standby position until the plate discharge full sensor 71 is turned on.
Further, the plate discharge full sensor 71 outputs the base paper full signal when the sensor block plate 67 does not block the light even when the compression plate 63 rotates and is off.

A box hook 72 is rotatably provided on the main body 8 below the front surface 61b of the plate discharge storage box 61. The box hook 72 presses the front surface 61 b of the plate discharge storage box 61 toward the inside of the main body 8 by a spring 73 and urges it. The plate discharge storage box 61 is unlocked by the box hook 72 by rotating the box hook 72 against the spring 73, and the grip 62 can be grasped and taken out from the main body 8.

The plate discharge section 5 is provided with a receiving base 74 for arranging the plate discharge storage box 61 at a predetermined position. The pedestal 74 is provided with a box set sensor 75 including a limit switch and a reflection type sensor for detecting whether or not the discharged stencil storage box 61 is arranged at a predetermined position on the pedestal 74. The box set sensor 75 is turned on and outputs a box set signal when the plate discharge storage box 61 is placed at a predetermined position of the pedestal 74.

As shown in FIG. 1 and FIG.
It is arranged at the bottom of the plate discharge storage box 61 and has a paper feed table 80 on which printing paper P is stacked. The paper feeding table 80 is inclined downward toward the base end portion 80a on the main body 8 side.
The printing paper P is provided on both sides of the paper feeding base 80 near the base end 80a.
A plate-shaped paper feed fence 81 that regulates and holds the width of the paper is provided. The paper feed fence 81 is the paper feed tray 8 in FIG.
It is adjustable in conjunction with the left and right direction of 0, and is adjusted to a position where both sides of the printing paper P are aligned according to the size of the printing paper P.

At the base end portion 80a of the paper feed table 80, a support frame 82 which is vertically movable with respect to the main body 8 is provided upright. The surface of the support frame 82 on the main body 8 side is the rack 8
3 is formed. The rack 83 meshes with the pinion 84, and rotation from an elevator motor 85 provided in the main body 8 is transmitted. As a result, the paper feed table 80 can be moved in the vertical direction of the main body 8 with the printing paper P placed thereon.

A blocking plate 86 bent in an L-shape is provided at the lower part of the support frame 82. A paper feed lower limit sensor 87 including, for example, a light emitter and a light receiver is provided at a position corresponding to the blocking plate 86 in the main body 8. The paper feed lower limit sensor 87 is turned on / off by the blocking plate 86. The paper feed lower limit sensor 87 is turned on and outputs a lower limit position signal when the blocking plate 86 blocks light. The reference position of the paper feed tray 80 is the position where the paper feed lower limit sensor 87 is turned on, that is, the position where the upper end of the paper feed fence 81 is lower than the bottom surface 61c of the plate discharge storage box 61 by a height H as shown in FIG. I am trying.

At the center of the lower part of the plate discharge storage box 61 in the main body 8, a support shaft of a pickup roller 88 for taking out the printing papers P one by one from the paper feed table 80 is rotatably supported by the side plate of the main body 8. The pickup roller 88 is connected to the main motor 26 via a paper feed clutch 89, and rotation from the main motor 26 is intermittently transmitted. A roller 91 is rotatably supported by the pickup roller 88 via a mounting plate 90. This roller 91
The rotation of the pickup roller 88 is transmitted via a drive transmission mechanism (not shown), and the pickup roller 88 is rotationally driven in synchronization with the pickup roller 88. The mounting plate 90 that rotatably supports the roller 91 is rotatable about the support shaft of the pickup roller 88. A blocking plate 92 is attached to the attachment plate 90. A paper transport roller pair 93 is provided near the pickup roller 88 and between the plate cylinder 25 and the printing paper P to send the print paper P between the plate cylinder 25 and the press roller 39 at a predetermined timing.

On the main body 8 side above the mounting plate 90,
For example, a paper feed upper limit sensor 94 including a light projector and a light receiver is provided. The paper feed upper limit sensor 94 is turned on / off by the blocking plate 92 of the mounting plate 90. Paper feed upper limit sensor 94
The paper feed table 80 is raised to bring the uppermost printing paper P into contact with the roller 91, and the mounting plate 90 is picked up by the pickup roller 88.
When the blocking plate 92 is rotated about the support shaft of the above, and the blocking plate 92 blocks the light, it is turned on to output a sheet feeding position signal.

The paper feed tray 80 moves in the vertical direction of the main body 8 with the position at which the paper feed upper limit sensor 94 is turned on as the paper feed position, and the roller 91 and the pickup roller 88 cause the print paper P to move.
Are conveyed one by one from the top to the plate cylinder 25 side. As the printing paper P decreases, the roller 91 lowers and the mounting plate 90
Is rotated about the support shaft of the pickup roller 88 and the blocking plate 92 is disengaged from the paper feed upper limit sensor 94 and turned off, the elevator motor 85 is driven in the normal direction until the paper feed upper limit sensor 94 is turned on again. The paper feed table 80 is driven to rise.

The paper discharge section 7 is arranged on the lower right side of the main body 8, and has a separating claw 96, a paper discharge conveying device 97, and a paper discharge fence 98.
It has a paper ejection tray 98 provided with a. The separation claw 96 separates the printed printing paper P from the plate cylinder 25. The sheet discharging and conveying device 97 is configured by, for example, a belt conveyor type, and the printed printing paper P peeled off from the plate cylinder 25 by the separating claw 96.
Are conveyed to the side of the paper ejection tray 98. On the paper ejection tray 98, the printed printing paper P conveyed by the paper ejection conveying device 97 is placed with the width thereof aligned by the paper ejection fence 98a.

FIG. 6 shows an embodiment of a control system of the stencil printing machine 1 constructed as described above. This control system includes the document image reading unit 2, the plate making unit 3, the stencil printing mechanism unit 4, the plate discharging unit 5, the paper feeding unit 6, the paper discharging unit 7, and the plate discharging sensor 6 described above.
0, standby position sensor 70, plate discharge full sensor 71, box set sensor 75, paper feed lower limit sensor 87, paper feed upper limit sensor 94, CPU 100, ROM 10
1, RAM 102, operation panel 103, display unit 104,
The display drive circuit 105 is provided.

The CPU 100 is composed of a microprocessor and the like, and internally has a counter 100a and a timer 100b for counting the number of used stencil printing base papers S based on the base paper passing signal from the plate discharge sensor 60. The ROM 101 has a control program and a discharge plate storage box 6
The number of used stencil printing base sheets S that can be stored in 1 is preset and stored as plate discharge full data. RAM10
Reference numeral 2 stores the input information, the measured value of the timer 100b, the number of the stencil printing base paper S stored in the plate discharge storage box 61 every time the plate discharge process is executed, and the count value of the counter 100a in the CPU 100 is updated and stored at any time. . Operation panel 103
Is a mode setting key for setting the plate making mode or printing mode, a numeric keypad for setting the number of prints, a start key for instructing the execution of the printing process or the plate making process according to the mode set by the mode setting key, and the paper feed table to the reference position. It has a paper feed table lowering key for lowering to. Display unit 104
Is composed of, for example, a liquid crystal, and displays various information related to stencil printing, such as a stencil error display due to conveyance failure, a display indicating that the stencil printing base paper S stored in the stencil storage box 61 is full, and a display of the number of print settings. It is displaying. Display drive circuit 1
Reference numeral 05 controls switching of information displayed on the display unit 104. In the above control system, when the lowering control of the paper feed tray 80 is performed based on the count value of the counter 100a as described later, the configurations of the standby position sensor 70 and the plate discharge full sensor 71 become unnecessary.

In this control system, the plate discharge sensor 60, the standby position sensor 70, the plate discharge full sensor 71, the box set sensor 75, the paper feed lower limit sensor 87, the paper feed upper limit sensor 94,
Each information is input from the operation panel 103, and the ROM 101
In addition to recognizing the storage state of the stencil printing base paper S in the plate discharge storage box 61 according to the control program and data (full plate discharge data) stored in, the count value of the RAM 102 is updated, and the original image reading unit 2 and the plate making unit 3 are also updated. , Stencil printing mechanism section 4, plate discharge section 5, sheet feed section 6, sheet discharge section 7, display section 104,
An operation command is output to each of the display drive circuits 105 to control the control.

In the stencil printing machine 1 of this embodiment, as shown in FIG. 4, the paper feed tray 80 is raised and the paper feed fence 81 is hooked on the area in the take-out direction of the plate discharge storage box 61. When the conveyance failure or the plate discharge storage box 61 is full, as shown in FIGS. 2 and 5, the control for lowering the paper feed tray 80 until the plate discharge storage box 61 can be taken out from the main body 8 is performed as follows. Is done in this way. In addition to the above conditions, as conditions for lowering the paper feed tray, the printing paper P placed on the paper feed tray 80 disappears while the user continues to press the paper feed tray lower key provided on the operation panel 103. It's time to go. In this stencil printing machine 1,
When the power is turned on, the paper feed tray 8 should be at the stop position before the power is turned on.
0 is held.

Next, an outline of a series of operations of the stencil printing apparatus 1 configured as described above will be described with reference to the operation flowchart of FIG.

First, when the start button is pressed in the plate making mode, the image of the original is read by the original image reading unit 2 and at the same time, the plate is made according to the image information read by the original image reading unit 2. In the section 3, the plate-making process is performed on the roll-shaped stencil printing base paper S. At the same time, the current edition body 25
The used stencil printing base paper S wound around the
The plate discharge processing is carried out (ST1). After the plate ejection process is completed,
The stencil printing base paper S thus prepared has its front end locked to the plate cylinder 25 by the base paper clamp plate 28 and in that state.
Is rotated, the stencil printing base paper S is wound around the outer peripheral surface of the plate cylinder 25. When the plate cylinder 25 reaches a predetermined rotation angle during the plate-pressing operation of the stencil printing base paper S on the plate cylinder 25, the base paper cutter 20 is driven to cut the stencil printing base paper S. This completes the printing process. During the plate-pressing process, one sheet of printing paper P is supplied from the paper feeding unit 6 in synchronization with the rotation of the plate cylinder 25, and is pressed against the outer peripheral surface of the plate cylinder 25 by the press roller 39 to perform first printing. (ST2).

Next, input the number of prints in the print mode,
When the start button is pressed, the plate cylinder 25 is rotated,
The printing paper P supplied from the paper supply unit 6 is pressed against the outer peripheral surface of the plate cylinder 25 by the press roller 39 in synchronization with the rotation of the plate cylinder 25. Then, the ink supplied through the ink passage area of the plate cylinder 25 and the perforated portion of the stencil printing base paper S is transferred to the printing paper P. The printed printing paper P is separated from the plate cylinder 25 by the paper ejection unit 7 and ejected onto the paper ejection tray 98 (ST3). The above print processing is repeated until the set number of prints is reached.

Next, the plate discharging process in the plate discharging unit 5 and the full state of the stencil printing paper in the plate discharging storage box 61 are managed to control the sheet feeding unit 6.
The process of controlling the movement of the paper feed tray 80 in FIG. 8 will be described based on the flowcharts of FIGS. 8 to 11 and the time chart of FIG.

First, the control operation for lowering the paper feed tray 80 by detecting the full discharge state of the plate discharge storage box 61 by the standby position sensor 70 and the plate discharge full sensor 71 when the compression plate 63 is driven will be described.

The plate discharge operation flow is started by the user operating the plate making start button provided on the operation panel 103. First, the clamp solenoid 31 is turned on to engage the drive gear 32a with the gear 30 on the plate cylinder 25, which has stopped rotating at the initial rotation position.
A clamp opening operation is performed in which the clamp motor is turned on to move the base paper clamp plate 28 to the clamp release position (ST11).

After the clamp opening operation is completed, the drive gear 32a is moved by the operation of the clamp solenoid 31.
When a predetermined time required to disengage from the mesh with (ST12), the plate discharge is started.

For plate ejection, the plate ejection solenoid 42 is turned on to position the plate ejection claw 40 at the base paper stripping position, the plate ejection motor 54 is turned on to rotate the plate ejection roller pair 45, and the main motor 26 is turned on. It is performed by rotating the plate cylinder 25. When the plate discharge roller pair 45 rotates, the guide roller 46 and the guide roller pair 50 rotate in conjunction with this, and the respective conveyance guide belts 47, 5
1, 52 rotate in the transport direction. The timer 100b in the CPU 100 is synchronized with these ON operations.
The timer value T of is reset to 0 (ST13).

As a result, the stencil printing base paper S wound around and mounted on the outer peripheral surface of the plate cylinder 25 is peeled off from the plate cylinder 25 by the plate ejecting claw 40 as the plate cylinder 25 rotates, and the respective transport guide belts 47, 51. , 52 Guided plate storage box 6
It is sent into 1.

As described above, when the plate discharge operation is started, the timer set value Tset1 is set after the plate discharge operation is started.
Within a predetermined time determined by, for example, about 2 seconds, the detection state of the stencil sensor 60 changes from the state without stencil printing base paper to the state with stencil printing base paper, that is, the output signal of the stencil sensor 60 turns from OFF to ON. It is determined whether or not it has changed (ST14, 15, 16, 17).

When the plate discharge sensor 60 does not output the base paper passing signal within a predetermined time determined by the timer set value Tset1 after the plate discharge operation is started, that is, when the plate discharge sensor 60 remains off (ST16). −
Yes), the leading edge side of the stencil printing base paper S to be discharged does not pass through the front portion of the plate discharge roller pair 45 due to a jam or the like, and is in a poor conveyance state. In this case, the plate discharge motor 54
Is turned off to stop the rotation of the plate discharge roller pair 45, the main motor 26 is turned off to stop the rotation of the plate cylinder 25, and a plate discharge error process is performed (ST18) to prohibit the start of the next operation process. . Then, the CPU 100 outputs to the display drive circuit 105 a command to display a plate discharge defect warning, and displays a plate discharge defect warning on the display unit 104 (ST.
19). In this state, the elevator motor 85 is reversely driven to lower the paper feed tray 80 (ST20). Then, when the paper feed tray 80 descends to the lower limit position and the paper feed lower limit sensor 87 is turned on (ST21-Yes), the elevator motor 8
The reverse rotation drive of 5 is stopped (ST22). In this state, the plate discharge storage box 61 is pulled out from the main body 8 forward, and the process for removing the stencil printing base paper S that is in a poorly conveyed state is performed.

On the other hand, after the plate discharge operation is started,
When the output signal of the plate discharge sensor 60 changes from OFF to ON within a predetermined time determined by the timer set value Tset1 (ST14-Yes), the front end of the stencil printing base paper S to be discharged is normally set to the plate discharge roller pair. It is a state in which the plate has been passed through the front part of 45 and the plate is normally discharged. In this case, the timer value T of the timer 100b in the CPU 100 is reset to 0 (ST17). Then, from this time, within a predetermined time determined by the timer set value Tset2, for example, about 10 seconds, the plate discharge sensor 60
Of the stencil printing base paper is changed from the stencil printing base paper present state to the stencil printing base paper non-existing state, that is, it is determined whether or not the plate discharge sensor 60 is changed from ON to OFF to output the base paper passing signal (ST23, 24, 25).

If the plate discharge sensor 60 does not change from ON to OFF within a predetermined time determined by the timer set value Tset2 after the output signal of the plate discharge sensor 60 changes to ON (ST25-Yes). The rear end of the stencil printing base paper S to be discharged is in a poor conveyance state in which it has not passed the front portion of the plate discharge roller pair 45 due to a jam or the like. In this case, the operations of ST18 to ST22 are performed in order to perform the plate discharge error process and control the lowering of the paper feed tray 80.

On the other hand, after the output signal of the plate discharge sensor 60 changes to ON, the plate discharge sensor 60 changes from ON to OFF and outputs the original paper passage signal within a predetermined time determined by the timer set value Tset2. If you do (ST
23-Yes), the rear end of the stencil printing base paper S to be discharged normally passes through the front portion of the plate discharge roller pair 45, and the plate discharge is completed normally.

After the output signal of the plate discharge sensor 60 changes from ON to OFF, a predetermined time determined by the timer set value Tset1, eg, about 2 seconds, elapses (ST
26), the plate ejection claw solenoid 42 is turned off to return the plate ejection claw 40 to the retracted position. Then, the plate discharge motor 54 is turned off to stop the rotation of the plate discharge roller pair 45, and
The main motor 26 is turned off to stop the rotation of the plate cylinder 25 at the position shown in FIG. 1 (ST27). In this state, the compression motor 66 is driven in the normal direction to compress the stencil printing base paper S, and the plate discharge operation is completed. At this time, the timer value T of the timer 100b in the CPU 100 is reset to 0 in synchronization with the driving of the compression motor 66 (ST28).

Next, it is judged whether or not the plate discharge full sensor 71 is not turned on and a base paper full signal is output within a predetermined time determined by the timer set value Tset3 (ST.
29, 30, 31). Here, when the plate discharge full sensor 71 is on (ST29-Yes), the stencil printing base paper S
In the state in which the compression is sufficiently performed, the normal rotation drive of the compression motor 66 is stopped (ST32), the compression motor 66 is reversely driven, and the compression plate 63 is returned to the standby position side (ST33). When the compression plate 63 is returned to the standby position by the reverse drive of the compression motor 66 and the standby position sensor 70 is turned on (ST34-Ye
s), the reverse rotation drive of the compression motor 66 is stopped (ST3
5) Then, the operation shifts to the next plate-forming process and first printing operation.

On the other hand, the plate discharge full sensor 71 does not turn on and outputs the base paper full signal (ST29-No), and when the timer value T exceeds the timer set value Tset3 (ST31).
-Yes), the normal rotation drive of the compression motor 66 is stopped (ST
36), the compression motor 66 is reversely driven to return the compression plate 63 to the standby position side (ST37). When the compression plate 63 is returned to the standby position by the reverse drive of the compression motor 66 and the standby position sensor 70 is turned on (ST38-Yes), the reverse drive of the compression motor 66 is stopped (ST39), and the elevator motor 85 is reversely driven. Lower the paper feed table 80 (ST4
0). Then, the paper feed lower limit sensor 87 is turned on and the paper feed tray 8
When 0 goes down to the lower limit position (ST41-Yes), the reverse rotation drive of the elevator motor 85 is stopped (ST4).
2). Then, the CPU 100 outputs a command to the display drive circuit 105 to display a plate discharge full warning, and the display unit 104
A full plate discharge warning is displayed (ST43). In this state, the stencil storage box 61 is pulled out from the main body 8 to the front, and the stencil printing base paper S in the stencil storage box 61 is removed (ST44). After that, the process proceeds to the plate-receiving process, the first printing, and the normal printing process (ST2 to ST3). It should be noted that the plate discharge storage box 6 is detected by the above-described plate discharge full detection.
Until the stencil sheet S in 1 is discarded (until the box set sensor 75 is turned off and then turned on), the subsequent plate making process is prohibited, but since it does not affect the printing process, the plate making process and the first process are performed. Printing operation is allowed.

Next, the counter 100 in the CPU 100
The control operation of detecting the full plate discharge state of the plate discharge storage box 61 by a and lowering the paper feed tray 80 will be described. In addition,
The same steps (ST11 to ST2) as the operation shown in FIG.
The description of 7) is omitted.

At ST27, the plate discharge motor 54 is turned off to stop the rotation of the plate discharge roller pair 45.
When the main motor 26 is turned off and the rotation of the plate cylinder 25 is stopped at the position shown in FIG. 1, the counter 100a in the CPU 100 starts counting the base paper passing signal from the plate discharge sensor 60. The counter 100a changes the detection state of the stencil sensor 60 from the state with the stencil printing base paper to the state without the stencil printing base paper, that is, whenever the stencil discharge sensor 60 changes from on to off and the base paper passing signal is output. Is counted (ST51), and the count value C is used as the number of stencil printing base sheets S to be discarded in the plate discharge storage box 61. If the count value C of the counter 100a is not the value of the discharged plate full data (ST52-No), the process proceeds to the next plate-forming process and first printing operation.

On the other hand, if the count value C of the counter 100a is the value of the discharged plate full data (ST52-Ye)
s), the CPU 100 determines that the stencil storage box 61 is full of the used stencil printing base paper S, and drives the elevator motor 85 in the reverse direction to lower the paper feed tray 80 (ST).
53). When the paper feed tray 80 descends to the lower limit position and the paper feed lower limit sensor 87 is turned on (ST54-Yes), the reverse rotation drive of the elevator motor 85 is stopped (ST55). Then, the CPU 100 outputs to the display drive circuit 105 a command for displaying a plate discharge full warning to display a plate discharge full warning on the display unit 104 (ST56). In this state, the plate discharge storage box 61 is pulled out from the main body 8 to the front side, and a discarding process for removing the stencil printing base paper S in the plate discharge storage box 61 is performed (ST.
57). When the discharged plate storage box 61 is pulled out from the main body 8,
The box set sensor 75 is turned off, and the count value C of the counter 100a is reset to 0 by this detection signal (ST58). After that, the process proceeds to the plate-receiving process, the first printing, and the normal printing process (ST2 to ST3). still,
Until the fullness is detected by the plate discharge full detection and the stencil printing base paper S in the plate discharge storage box 61 is discarded (until the box set sensor 75 is turned off and then turned on), the subsequent plate making process is prohibited. However, since the printing process is not affected, the plate-receiving process and the first printing operation are permitted.

Therefore, in the above-mentioned embodiment, the conveyance failure of the stencil printing base paper S until it is sent to the plate discharge storage box 61 is detected by the detection signal of the plate discharge sensor 60. Further, the full state of the plate discharge storage box 61 is detected by the detection signal of the plate discharge full sensor 71 when the compression plate 63 is driven. When the discharge box 61 is full, the CPU
It is also detected by comparing the count value of the counter 100a in 100 with preset discharge plate full data.

In the stencil printing apparatus of this embodiment, when the poor conveyance of the stencil printing base paper S or the full discharge state of the stencil printing paper is detected as described above, the paper feed tray 80 is automatically lowered to the lower limit position. Therefore, the plate discharge storage box 61 can be taken out from the main body 8 forward without the paper feed fence 81 interfering. Moreover, since the paper feeding position of the printing paper P placed on the paper feeding table 80 can be arranged in the vicinity of the lower portion of the plate discharge storage box 61, the space in the height direction of the main body 8 can be reduced to reduce the apparatus size. The size can be reduced, and a sufficient storage space for the plate discharge storage box 61 and a sufficient number of print sheets P that can be placed on the paper feed tray 80 can be secured.

The stencil printing base paper S to be discarded in the plate discharge storage box 61 is compressed by rotating the compression plate 63 to the front surface 61b side of the plate discharge storage box 61 until the plate discharge full sensor 75 is turned on and becomes full. Since it is stored, it is possible to store a large number of stencil printing base paper S by making maximum use of the storage space in the plate discharge storage box 61.

By the way, in the operation according to the flow of FIGS. 8 to 11 described above, the feeding table 80 is automatically lowered to the lower limit position when the conveyance is defective or the plate discharge storage box 61 is full. 8 to 11 are changed to steps shown by a chain line in FIG.
The descent control may be performed.

In this case, the timer 10 in the CPU 100
The timer set value Tset4 is arbitrarily set to 0a by the user. The timer set value Tset4 is set such that, for example, when one or no printing paper P is placed on the paper feed tray 80, the position of the upper end of the paper feed fence 81 of the paper feed tray 80 causes the plate discharge storage box 61 to be removed from the main body 8. This is the time required to lower the paper feed tray 80 to a position where it does not interfere with the drawing.

In the operation according to this flow, the timer value T of the timer 100b is reset to 0 while the elevator motor 85 is driven in reverse (ST61). Then, when the timer value T reaches the timer set value Tset4 (ST62-Yes), the reverse rotation drive of the elevator motor 85 is stopped. Further, in a state where the timer value T does not reach the timer set value Tset4 as in the case where the number of the printing paper sheets P placed on the paper feed tray 80 is large (ST62-N
o), when the paper feed lower limit sensor 87 is turned on (ST63-Y
es), the reverse rotation drive of the elevator motor 85 is stopped. If the paper feed lower limit sensor 87 is not turned on (ST
63-No), and returns to ST62. As a result, if a conveyance failure occurs or the plate discharge storage box 61 becomes full,
It is possible to control the sheet feeding table 80 to descend to a position where the plate discharge storage box 61 can be pulled out from the main body 8 according to the number of placed printing sheets P.

In the operation according to the above flow, when a conveyance failure occurs or the plate discharge storage box becomes full, the detection value of the paper feed lower limit sensor 87 is not used and the timer value T is set to the timer set value. If the elevator motor 85 is driven in reverse until Tset4 is reached, the paper feed tray 80 can be lowered to a position where the plate discharge storage box 61 can be pulled out from the main body 8 regardless of the number of print sheets P placed. it can. Further, in the above-described embodiment, the case has been described in which a part of the paper feed tray 80 rises to a range that covers the area of the plate discharge storage box 61 in the pull-out direction, but the paper feed tray 80 is raised to the vicinity of that area. Even when it is carried out, it is difficult to take out the plate discharge storage box 61, and therefore the same lowering control of the paper feed tray 80 as described above can be used.

[0075]

According to the stencil printing apparatus of the first to third aspects of the present invention, when at least one of the conveyance failure of the stencil printing base paper and the full discharge state of the stencil storage box is detected, the paper feed tray is moved. Since the configuration is automatically controlled to be lowered, the plate discharge storage box can be taken out from the main body without disturbing the adjusting means provided on the paper feed table. Moreover, since the paper feeding position of the printing paper placed on the paper feeding stand can be arranged in the vicinity of the lower part of the stencil storage box, the space in the height direction of the main body can be reduced and the apparatus can be downsized. As compared with the conventional case, it is possible to secure a sufficient storage space for the discharged sheet storage box and the number of printing sheets that can be placed on the paper feed table.

According to the stencil printing apparatus of the fourth aspect, the stencil printing base paper to be discarded in the stencil storage box is compressed by moving the compression plate to a predetermined position and stored until it is full. It is possible to store many stencil printing base papers by maximizing the use of the storage space in the storage box.

According to the stencil printing apparatus of claim 7 or 8,
When a conveyance failure occurs or the plate discharge storage box is full, the paper feed tray can be reliably lowered to a position where the plate discharge storage box can be pulled out from the main body.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a stencil printing apparatus according to the present invention.

FIG. 2 is a side view showing a detailed configuration of a plate discharging section and a sheet feeding section in the same apparatus.

FIG. 3 is a view of the same device as seen from the take-out direction of the stencil storage box.

FIG. 4 is a side view of the apparatus when the paper feed tray is raised to an upper limit position.

FIG. 5 is a side view showing a state in which the paper feed tray is lowered to a lower limit position and the plate discharge storage box is taken out from the main body in the apparatus.

FIG. 6 is a block diagram showing an embodiment of a control system of the device.

FIG. 7 is an operation flowchart showing an outline of a series of operations of the apparatus.

FIG. 8 is an operation flowchart diagram in the case where the standby position sensor and the plate discharge full sensor when driving the compression plate detects the plate discharge full state of the plate discharge storage box and controls the lowering of the paper feed tray in the same apparatus.

FIG. 9 is an operation flowchart diagram in the case of detecting the full plate discharge state of the plate discharge storage box by a standby position sensor and a plate discharge full sensor when driving the compression plate in the same apparatus, and controlling the lowering of the paper feed tray.

FIG. 10 is an operation flowchart diagram in the case where the counter in the CPU detects the plate discharge full state of the plate discharge storage box and controls the lowering of the sheet feed tray in the apparatus.

FIG. 11 is an operation flowchart diagram in the case where the counter in the CPU detects a plate discharge full state of the plate discharge storage box and controls the lowering of the sheet feed tray in the apparatus.

FIG. 12 is a time chart of the plate discharge processing operation in the plate discharge unit of the apparatus.

FIG. 13 is an operation flow chart showing another embodiment in which the paper feed tray is controlled to descend in the apparatus.

FIG. 14 is a diagram showing a schematic configuration of a conventional stencil printing apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Stencil printer, 5 ... Plate discharge part, 6 ... Paper feed part, 8 ... Main body, 25 ... Plate cylinder, 54 ... Plate discharge motor, 60 ... Plate discharge sensor, 61 ... Plate discharge storage box, 63 ... Compression plate, 66 ... Compression Motor, 70 ... Standby position sensor, 71 ... Plate discharge full sensor, 7
5 ... Box set sensor, 80 ... Paper feed base, 81 ... Paper feed fence, 85 ... Elevator motor, 87 ... Paper feed lower limit sensor, 94 ... Paper feed upper limit sensor, 100 ... CPU, 100
a ... counter, 100b ... timer, 102 ... RA
M, S ... Base paper for stencil printing, P ... Printing paper.

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-215429 (JP, A) JP 55-16838 (JP, A) JP 6-255807 (JP, A) JP 5- 318901 (JP, A) JP-A-6-255228 (JP, A) Actual development 1-148345 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B41L 13/04 B41L 13 /14

Claims (8)

(57) [Claims] 1. A plate discharging means having a removable plate discharging storage box in a main body, for scraping a used stencil printing base paper wound around an outer peripheral surface of a plate cylinder, transporting it to the plate discharging storing box and discarding it. And a paper feed table on which printing paper is placed, and the paper feed table is moved to a range where a part of the paper feed table covers an area in the pull-out direction of the plate discharge storage box, or to the vicinity of the range. And a sheet feeding unit arranged below the plate discharging unit for supplying the printing sheets one by one to the plate cylinder side, and the stencil printing base paper stripped from the plate cylinder is conveyed to the plate discharging storage box. A stencil sheet conveyance failure detection unit that detects a conveyance failure during conveyance, a stencil sheet full sheet detection unit that detects that the stencil sheet discarded in the plate discharge storage box is full, and the stencil sheet conveyance failure Raw paper transport failure signal from the detection means or the full raw paper Stencil printing apparatus characterized by a control means for lowering the feeding table receives the raw paper full signal from the means out. 2. A plate discharging means having a removable plate discharging storage box in a main body, for scraping a used stencil printing base paper wound around an outer peripheral surface of a plate cylinder, transporting it to the plate discharging storing box, and discarding it. And a paper feed table on which printing paper is placed, and the paper feed table is moved to a range where a part of the paper feed table covers an area in the pull-out direction of the plate discharge storage box, or to the vicinity of the range. And detects that the stencil printing base paper that has been discarded in the stencil storage box has become full and that the stencil printing paper has been filled up. A stencil printing machine comprising: a base paper full detection unit; and a control unit that receives the base paper full signal from the base paper full detection unit and lowers the paper feed tray. 3. A plate discharging means having a removable plate discharging storage box in a main body, for stripping a used stencil printing base paper wound around an outer peripheral surface of a plate cylinder, transporting it to the plate discharging storing box, and discarding it. And a paper feed table on which printing paper is placed, and the paper feed table is moved to a range where a part of the paper feed table covers an area in the pull-out direction of the plate discharge storage box, or to the vicinity of the range. And a sheet feeding unit arranged below the plate discharging unit for supplying the printing sheets one by one to the plate cylinder side, and the stencil printing base paper stripped from the plate cylinder is conveyed to the plate discharging storage box. A base paper conveyance failure detection unit that detects a conveyance failure during conveyance, and a control unit that receives the base paper conveyance failure signal from the base paper conveyance failure detection unit and lowers the paper feed tray. Stencil printer. 4. A compression plate for compressing the stencil printing base paper stored in the plate discharge storage box,
The sensor for detecting that the compression plate has moved to a predetermined position during a compression operation, and outputs the base paper full signal when the compression plate does not reach the predetermined position during a compression operation of the compression plate. 2. The stencil printing machine according to 2. 5. A counter for counting the number of stencil printing bases that are stripped from the plate cylinder and discarded in the stencil storage box, and the stencil printing base paper that can be stored in the stencil storage box in advance. Storage means for storing the number of sheets as discharge plate full data, and outputs the base paper sheet full signal when the count value of the counter reaches the discharge plate full data stored in the storage means. Stencil printer. 6. The stencil sheet conveyance failure detection means has a sensor provided during conveyance of the stencil printing sheet stencil stripped from the plate cylinder to the stencil sheet storage box, and at the time of stencil sheet discharge processing, the sensor is provided. 4. The stencil printing apparatus according to claim 1, wherein the stencil printing failure signal is output when it is not detected that the stencil printing paper has passed through the sensor within a processing time. 7. The stencil printing apparatus according to claim 1, wherein the paper feed tray is lowered by the control means for a predetermined time. 8. A lower limit sensor, which is arranged at a lower limit position apart from the plate discharge unit by a predetermined amount below and detects whether or not the paper feed tray is at the lower limit position, wherein the paper feed tray is the lower limit sensor. 4. The stencil printing apparatus according to claim 1, wherein the control means controls the descending of the sheet until a signal indicating that the sheet feeding table is at the lower limit position is output.